Drove thru water, 80 acting up now.

[ironbinder]

We have been having flooding out here in Nor CAL as you have heard, Feb . 2017. Oroville Dam and all.
I was driving through some really long flooded streets less than a foot deep just having a blast, splashing up the water all over the place.
I was in my invincible FZJ 80, what was there to worry about. Right?

Well later my cruise control was not working, till about 6 hours later after driving on pavement.

Then my LOW RANGE was acting weird, when I was in Low but in the Drive position, my Tranny was shifting erratically, lurching.
I was wheeling offroad up here in Napa County and I got stuck the same day on a hillside in an area where silt collected, my rear wheels went down almost to the axles (33"tires) I refrained from using the accelerator and just 'spinning the wheels' ( I know NOT to do that) Got my rig out later all by myself in the dark while it was raining, another epic story for later.

Just seemed like my center diff. lock was not working that well.

Are there electronic servos that actuate the center diff lock? That I could have messed up by getting underside of my Cruiser wet.? Also, Dash indicator light for Center Diff. lock not coming on.

I don't have lockers.

 

[mct75]

TPS, spark plug tubes, and distributor are always what tear up.

 

[Hornd]

Pull the connector on Center Diff Actuator and have a look.
Adding some dielectric grease would help.
Make sure breather is clear.

 

[ironbinder]

Pull the connector on Center Diff Actuator and have a look.
Adding some dielectric grease would help.
Make sure breather is clear.

Thanks, will do, is there anything else to water proof?
Also where is the location of the Center Diff Actuator?

 

[ironbinder]

TPS, spark plug tubes, and distributor are always what tear up.

thanks, hey, what is TPS?

 

[Brentbba]

TPS - Throttle Position Sensor. It sits up on top of the engine. Sounds like you got a whole bunch if electrical wet. Air hose to dry affected components will help too.

 

[Malleus]

TPS is the Throttle Position Sensor. It's T1 on the second diagram (on top of the head, near the outlet of the air intake) Hard to believe that's your problem driving through 1-foot deep water, though.

Here's what's on the Transmission/Transfer case:
A3/C1/C2/E2

T2/T3/V1/V2

C1/C2 are on top of the transfer case; it's easier to see them from the passenger side.
A3's on the side, near the plumbing.
V2's on the side sort of 2 o'clock, looking rearward, IIRC.
T3/V1 are next to each other on the driver's side of the transfer case. T2's on the top.

My guess is that you have a dirty or loose connection in T3, and/or water in your distributor cap.

You might try cleaning the connectors with contact cleaner and seal the joint with dielectric grease, or Vaseline, and drying your distributor cap (the inside, of course).

 

[Malleus]

Transfer case sensors, DS

Diff lock motor and position switch

 

[LINUS]

Aside from the specific answers you have - @Hornd used my blanket reply for your situation.

Go nuts & spend a few hours going through the 80 with dielectric or lithium grease & grease the plug / sockets of all the wiring harness. You'll spend more time than money & real 4WD's need a modicom of waterproofing.

Underhood mainly, but underbody is where you're bit right now with the CDL.

It also lets you see the 80 from all sorts of angles & see if there's anything going bad or chachi 'mods' from a previous owner.

 

[ironbinder]

Thanks for all the answers and diagrams excellent information.

Another closely related question to this issue, is I'm trying to understand how the engagement of the differential lock system works.

It sounds like from what I'm learning here the differential lock engagement system is dependent on some sort of electronic servo not just the mechanical linkage when I pull down the shifter knob

Also when I was in the mud the other day and I shifted down until low range I was still able to drive forward. So what I'm also asking is is it possible to drive in low range but not have your differential lock fully engaged?

 

[LINUS]

It's called the 'Pin 7 mod'.

Or @jonheld likes it when you call it the 7 pin mod.

 

[ironbinder]

???
Can you elaborate a little more? 7 pin mod?

I have no clue but now I have have to know all about this

 

[retrofive]

???
Can you elaborate a little more? 7 pin mod?

I have no clue but now I have have to know all about this

Center Differential Lock (CDL) & 7 Pin Mod Video